C# Oracle-IF语句插入WHERE子句

我应该将C代码翻译成Oracle中的存储过程

我在where中编写了一个带有case when的存储过程，但是没有返回正确的数据。我错在哪里

问题在于管理输入参数的IFs

甲骨文：

CREATE OR REPLACE PROCEDURE SP_S_RICCFEMESSE 
(
    NUMEROCV        IN VARCHAR2,
    PROFILO         IN NUMBER,
    SALAES          IN NUMBER,
    DATAINIZIO      IN VARCHAR2,
    DATAFINE        IN VARCHAR2,
    ric_carteemesse OUT SYS_REFCURSOR
)
AS 
BEGIN
    OPEN ric_carteemesse FOR
       SELECT DISTINCT A.*
                ,DESCARDPRFCFR AS TIPO_CARTA
                ,TO_CHAR(DATNAS,'DD/MM/YYYY') AS DATA_DI_NASCITA 
                ,TO_CHAR(A.DATIVOPSA,'DD/MM/YYYY HH24:MI:SS') AS DATA_EMISSIONE 
                ,TO_CHAR(DATINIVALRTA,'DD/MM/YYYY') AS INIZIO_VALIDITA_CARTA 
                ,TO_CHAR(DATFINIVALRTA,'DD/MM/YYYY') AS FINE_VALIDITA_CARTA 
                ,C.S_DENOMINAZIONE AS SALA_ES 
                ,CASE 
                    WHEN NVL(SCDUP,0) = '0' 
                    THEN 'NO' 
                    WHEN SCDUP > 0 
                    THEN 'SI' 
                END AS DUPLICATO 
FROM 
DEMIRTAFRC A 
INNER JOIN SMART_CARD B 
    ON A.CODSRE = B.COD_SM 
LEFT JOIN RIVENDITA C 
    ON B.S_POSTAZIONE_UM = TO_CHAR(C.COD_RIVENDITA) 
INNER JOIN DANACARDPRFCFR D ON A.CODPRF= D.CARDPRFCFR 
WHERE 
    (B.D_ELETTRIFICAZIONE BETWEEN TO_DATE(DATAINIZIO,'DD/MM/YYYY') AND TO_DATE(DATAFINE,'DD/MM/YYYY') 
    AND A.MDLCSG = 'CBM' AND CODSRE IS NOT NULL)
    AND NUMEROCV = (CASE WHEN NUMEROCV <> '' 
                         THEN A.CODRTA
                         ELSE null 
                    END)
    AND PROFILO = (CASE WHEN PROFILO <> 0 
                        THEN B.COD_REQUISITI
                        ELSE null 
                   END)
    AND SALAES = (CASE WHEN SALAES <> 999
                       THEN B.S_POSTAZIONE_UM
                       ELSE null 
                  END)
ORDER BY A.DATETR DESC;

END SP_S_RICCFEMESSE;

---

PROFILO、SALES、NUMEROCV列中是否有空值。 如果是，则必须在where part中的该列上设置nvl

因为你说你可能有空，所以试试这个：

 CREATE OR REPLACE PROCEDURE SP_S_RICCFEMESSE 
(
    NUMEROCV        IN VARCHAR2,
    PROFILO         IN NUMBER,
    SALAES          IN NUMBER,
    DATAINIZIO      IN VARCHAR2,
    DATAFINE        IN VARCHAR2,
    ric_carteemesse OUT SYS_REFCURSOR
)


AS 
BEGIN

OPEN ric_carteemesse FOR
SELECT DISTINCT A.*
                ,DESCARDPRFCFR AS TIPO_CARTA
                ,TO_CHAR(DATNAS,'DD/MM/YYYY') AS DATA_DI_NASCITA 
                ,TO_CHAR(A.DATIVOPSA,'DD/MM/YYYY HH24:MI:SS') AS DATA_EMISSIONE 
                ,TO_CHAR(DATINIVALRTA,'DD/MM/YYYY') AS INIZIO_VALIDITA_CARTA 
                ,TO_CHAR(DATFINIVALRTA,'DD/MM/YYYY') AS FINE_VALIDITA_CARTA 
                ,C.S_DENOMINAZIONE AS SALA_ES 
                ,CASE 
                    WHEN NVL(SCDUP,0) = '0' 
                    THEN 'NO' 
                    WHEN SCDUP > 0 
                    THEN 'SI' 
                END AS DUPLICATO 
FROM 
DEMIRTAFRC A 
INNER JOIN SMART_CARD B 
    ON A.CODSRE = B.COD_SM 
LEFT JOIN RIVENDITA C 
    ON B.S_POSTAZIONE_UM = TO_CHAR(C.COD_RIVENDITA) 
INNER JOIN DANACARDPRFCFR D ON A.CODPRF= D.CARDPRFCFR 
WHERE 
    (B.D_ELETTRIFICAZIONE BETWEEN TO_DATE(DATAINIZIO,'DD/MM/YYYY') AND TO_DATE(DATAFINE,'DD/MM/YYYY') 
    AND A.MDLCSG = 'CBM' AND CODSRE IS NOT NULL)
    AND nvl(NUMEROCV, ' ') = (CASE WHEN nvl(NUMEROCV, ' ') <> ' ' 
                         THEN A.CODRTA
                         ELSE null 
                    END)
    AND nvl(PROFILO, 0) = (CASE WHEN nvl(PROFILO, 0) <> 0 
                        THEN B.COD_REQUISITI
                        ELSE null 
                   END)
    AND NVL(SALAES, 0) = (CASE WHEN NVL(SALAES, 0) <> 999
                       THEN B.S_POSTAZIONE_UM
                       ELSE null 
                  END)
ORDER BY A.DATETR DESC;

END SP_S_RICCFEMESSE;

---

PROFILO、SALES、NUMEROCV列中是否有空值。 如果是，则必须在where part中的该列上设置nvl

因为你说你可能有空，所以试试这个：

 CREATE OR REPLACE PROCEDURE SP_S_RICCFEMESSE 
(
    NUMEROCV        IN VARCHAR2,
    PROFILO         IN NUMBER,
    SALAES          IN NUMBER,
    DATAINIZIO      IN VARCHAR2,
    DATAFINE        IN VARCHAR2,
    ric_carteemesse OUT SYS_REFCURSOR
)


AS 
BEGIN

OPEN ric_carteemesse FOR
SELECT DISTINCT A.*
                ,DESCARDPRFCFR AS TIPO_CARTA
                ,TO_CHAR(DATNAS,'DD/MM/YYYY') AS DATA_DI_NASCITA 
                ,TO_CHAR(A.DATIVOPSA,'DD/MM/YYYY HH24:MI:SS') AS DATA_EMISSIONE 
                ,TO_CHAR(DATINIVALRTA,'DD/MM/YYYY') AS INIZIO_VALIDITA_CARTA 
                ,TO_CHAR(DATFINIVALRTA,'DD/MM/YYYY') AS FINE_VALIDITA_CARTA 
                ,C.S_DENOMINAZIONE AS SALA_ES 
                ,CASE 
                    WHEN NVL(SCDUP,0) = '0' 
                    THEN 'NO' 
                    WHEN SCDUP > 0 
                    THEN 'SI' 
                END AS DUPLICATO 
FROM 
DEMIRTAFRC A 
INNER JOIN SMART_CARD B 
    ON A.CODSRE = B.COD_SM 
LEFT JOIN RIVENDITA C 
    ON B.S_POSTAZIONE_UM = TO_CHAR(C.COD_RIVENDITA) 
INNER JOIN DANACARDPRFCFR D ON A.CODPRF= D.CARDPRFCFR 
WHERE 
    (B.D_ELETTRIFICAZIONE BETWEEN TO_DATE(DATAINIZIO,'DD/MM/YYYY') AND TO_DATE(DATAFINE,'DD/MM/YYYY') 
    AND A.MDLCSG = 'CBM' AND CODSRE IS NOT NULL)
    AND nvl(NUMEROCV, ' ') = (CASE WHEN nvl(NUMEROCV, ' ') <> ' ' 
                         THEN A.CODRTA
                         ELSE null 
                    END)
    AND nvl(PROFILO, 0) = (CASE WHEN nvl(PROFILO, 0) <> 0 
                        THEN B.COD_REQUISITI
                        ELSE null 
                   END)
    AND NVL(SALAES, 0) = (CASE WHEN NVL(SALAES, 0) <> 999
                       THEN B.S_POSTAZIONE_UM
                       ELSE null 
                  END)
ORDER BY A.DATETR DESC;

END SP_S_RICCFEMESSE;

---

空永远不等于空。因此，如果任何CASE语句转到ELSE分支，则该语句的计算结果将为FALSE。另外，在Oracle中，空字符串与NULL相同是的，这是有争议的，但Oracle已经这样做了将近四十年，这就是它的方式，这意味着这永远是错误的：NUMEROCV

简单的解决方案是，不要在WHERE子句中使用CASE。这一点更加明确：

AND (NUMEROCV is null or NUMEROCV = A.CODRTA)
AND (PROFILO = 0 or PROFILO = B.COD_REQUISITI)
AND (SALAES = 999 or SALAES = B.S_POSTAZIONE_UM))

---

空永远不等于空。因此，如果任何CASE语句转到ELSE分支，则该语句的计算结果将为FALSE。另外，在Oracle中，空字符串与NULL相同是的，这是有争议的，但Oracle已经这样做了将近四十年，这就是它的方式，这意味着这永远是错误的：NUMEROCV

简单的解决方案是，不要在WHERE子句中使用CASE。这一点更加明确：

AND (NUMEROCV is null or NUMEROCV = A.CODRTA)
AND (PROFILO = 0 or PROFILO = B.COD_REQUISITI)
AND (SALAES = 999 or SALAES = B.S_POSTAZIONE_UM))

---

如果你有很多标准，你可以动态地构建sql

声明sql\u语句

sql_statement VARCHAR2(...);

sql_statement := 'SELECT .... WHERE ' // your select

IF PROFILO <> 0 THEN // your criteria here
    sql_statement := sql_statement || ' AND B.COD_REQUISITI = ' || PROFILO // your criteria here;

EXECUTE IMMEDIATE(sql_statement);

---

如果你有很多标准，你可以动态地构建sql

声明sql\u语句

sql_statement VARCHAR2(...);

sql_statement := 'SELECT .... WHERE ' // your select

IF PROFILO <> 0 THEN // your criteria here
    sql_statement := sql_statement || ' AND B.COD_REQUISITI = ' || PROFILO // your criteria here;

EXECUTE IMMEDIATE(sql_statement);